Advantages & Disadvantages of Disconnector 3

[anhduc9302]

There are 4 types of disconnector: Vertical break type, Centre side break type, Double side break type,Pantograph type. I'm searching documents about advantages & disadvantages of disconnector. Can you give me some documents or information about this topic ??? Thank you

 

[cuky2000]

There are many disconnect switch designs (>4) and mounting options for HV for transmission systems application. Disconnect switches are manufactured to meet the specifications of different markets. The following are quick descriptions:

1) The vertical break disconnect switch is one of the most popular switch in both ANSI & IEC market places. There are more data available for this type of switch than any other type including performance in shake table test for heavy seismic zones and sub-zero temperatures with Icebreaking capability used for rough extreme weather conditions. This switch can be equipped with an arcing horn, quick break whip. Although none of the HV disconnect switches are designed for load break, there are optional load break devices available for T. Line and transformer switching operations without circuit breakers.

2) Centre side break type switch requires at least the same clearance and is less strong than the vertical break type.

3) Double break disconnect switch requires less phase-to-phase clearances than any other switch type. It can be specified with arcing horns.

4) Pantograph disconnect switch is popular in the IEC marketplace. However, seldom or not use in the ANSI/IEEE marketplace.

5) Vertical break with folding arm switch are popular in Canada. There are seldom used in the USA and ANSI marketplaces.

_{NOTE: Disconnect switches manufactured for the IEC or other foreign standards may not conform with more stringent requirements of the ANSI/IEEE Standards.}

 

[anhduc9302]

Can you give me review on 4 types of disconnector in stability, moment requirement, area requirement, current interruption performance, please ???

 

[cuky2000]

Below is the product of a few switch manufacturers that I used and might provide some of the information that you are searching for particularly from geometric dimension and electrical ratings :
. 1)Link
. 2) Link
. 3) Link
. 4) Link

We are not sure what you mean by stability (electrical stability?), moment requirement or current interruption performance.

In general disconnect switches are designed to withstand force and the heating effect of a short circuit (I²t). They are mounted in a support structure above ground and specified with Insulators with enough cantilever strength to withstand safely loading combination such as forces created by a short circuit, wind, seismic, bus weight, etc. The moment and other forces are associated with the mounting arrange ad configuration of the switch.

Regarding current interruption, HV disconnect switches, at difference than circuit breakers, are not designed for the current interruption. At best, disconnect switches might be able to interrupt the small charging current of a single-digit Amp and even risky to open the magnetized current generated in unloaded power transformer. Instead, switches are designed for max peak current to withstand the sudden force created in the event of a short circuit.

_{Example of a switch rating (For system X/R ≤ 17):
a) Voltage rating 230 kVRMSNominal voltage, 242 kVRMS max., 900 kV BIL,
b) Current rating: 3000ARMS continuous current, 88kARMS symmetrical SC peak current and max. 142kA peak asymmetrical SC current.
c) Mounting: Upright}